How do I choose the best hair color shade for my hair?

Abhi, leave it naturally, as it is the best fashion trend forever, However you can go the gents parlour and ask for the suggestion of the beautician/hairdresser.

Well, firstly, don't go with the latest "fashion trend" as it might or might not suit you. Its not so necessary that you choose something closest to your natural shade, rather go to a hair specialist, he can help you in choosing the right color. I usually go with golden brown or burgundy, which is quiet good for Indian skin types.